Scientists from Southampton University, England are developing a generator that is only one cubic centimeter in size. This device is claimed to have 10 times the efficiency of general mini generators that are used in the present.
Like the working principle of generators in general, it generates electric energy from magnetic flux. This mini generator utilizes the natural vibration around it to move magnets in that device. The output of this generator’s electric power is in micro watt. The mini generator is planned to be used with tiny sensors that are wireless or work remotely. Of course, it is a huge advantage because we are more free to put sensors without having to worry about the batteries and communication cables. This device is designed to be placed in air compressors. The human heartbeat is enough to generate electricity that can be used by pacemakers. Besides, this generator application can be used for building sensors to monitor the condition of the building structure.
Summarized from BBC News.